Automobile bumper



April 24, 1928. 1,667,529

F. G. BREMER AUTOMOBILE BUMPER Filed July 26. 1927 Patented Apr. 24,1928. I

om'rso sTATEsj rnnnnmcx G. BREMER, or PI TSBURG PENNSYLVANIA, "Assmnon'ro' .8TATES-CHAIN FORGING COMPANY, OF PITTSBURGH, PENNSYLVANIA, A

POR-ATION OF DELAWARE.

AUTOMOBILE BUMPER- Application filed 1927. Serial K0 2083913.

Another object ofmy invent on 1s to provide an improved form'of buffersprings for automobile bumpers. 7

One form which my lnvention may take is shown in the accompany ngdrawing,

wherein Figure lis a plan view of the bumper structure mountedv upon theforwardportion of a vehicle frame; Fig. 2 is a view, on an enlargedscale,,taken on the .line IIII offlFig." 1, and Figs. 3, a and 5 eachshow a modification of the device of Fig. 2. I

This invention includes modifications of V the form of device describedand claimed in my copending application Serial No. 207,178, filed July20,1927. r

Referring to Figs. 1 and 2 of the draw= ing, I have represented portionsof the side frames of an automobileby the numerals 6.

Bracket arms 7, preferablyof spring steel r and curved in a horizontalplane are secured to the frame members 6.

A bumper bar'8 is shown as of tubular form in cross section, but maybeof variousv other shapes. Clamping collars 9 are provided forsupportingthe bumper barupon the forward ends of buffer springs 10 thatare curved in vertical planes, the forward ends of such springs beingpivotally connected to the collars 9 by means of bolts 11. The rear endsof the springs 10 are disposed in a horizontal-plane and perforated forthe reception of pivot bolts 12that extend through eyes formed in theouter ends of the bracket arms 7.

A brace member 13 is riveted to each of the springs 10 and is alsopivotally connected to its associated bracket arm '7, by means of one ofthe pivot bolts 12.

From the foregoing, itwill be seen that the buffer springs 10 arepivotally connected at their front and rear ends to the bar 8 and thebracket arms 7, respectively, the axes of such pivots being disposed atapproximately right angles to one another. Upon deflection ofthe bar 8by reason of Referring bar a nected at its outer end to said bar, abrace connectedto said buffer spring at a point n mp o oth w e; t Pa s;by eason of the resiliency oft-he members 7 and 10 nd th -pi l. on e ton refe red-t will be restored to their normal positions as shown inFig. 1 11110 1 r moval of] theitle j fl eti g The b aces. 13 se ve o]rein;- force the buffer springs 10 at their rear ends} and therebyreduce the tendency of ithe springs to become broken" or permanentlydistorted points. adjacent toj their;

similar to Fig. 2, but wherein the hrace to Fig. 3, I show strueti remember 1'3 extends forwardly for some distance, in abutting relagticm toa curved; portion of'the buffer spring 10, to afford reinforcement at a'point-farther re oved from the rear; pivotal connection of the bufferspring than'inthe case of Fig. 2: t

In isthe uffe pr g, .0 hown,

as braced by amember 13?, the positions of the members 10 and; 1 3 Wit'hrespect t -'O 't lfie pivot bolt 12 being" reversed as compared to thearrangement shown in Fig. 3. In the case of Fig. 3, the position of thebrace 13. renders it more particularly effective to resist tendency ofthe spring 10 to be deflectedv in a clockwise direction about the pivotbolt 12*, while in the case of Fig. 4,

the brace 13"- is more effective to resist tendency of the spring 10 tobe deflected in a counter-clockwise direction. If it is anticipated thatthe tendency of impacts upon the bar 8 of Fig. 3 will be to force itdownward, the brace 13 is especially suitable to resist such deflection,while if conditions are such that the bar 8 of Fig. 4 will tend to bedeflected upwardly under impacts, the brace 13 may be the moredesirable.

In Fig. 5, I show a structure similar to that of Fig. 4, but wherein thebrace 13 is extended for some distance within the curve of the bufferspring 10, thus not only affording a, support similar to that of thebrace 131 but also'servin to reinforce the i adjacent to its inner end,and means for connecting the inner ends of said spring and brace to avehicle frame, on an axis transverse to the axis of the first-namedpivotal connection.

2. Bumper structure comprising a butler spring curved in a verticalplane, a bumper bar connected to the outer end of said spring, a bracemember secured to said spring and having its rear end in verticallyspaced relation to the inner end of the spring, and means for connectingthe last-named ends to a support.

3. Bumper structure comprising a butler spring curved in a verticalplane, a bumper bar connected to the outer end of said sprin a bracemember secured to said spring and having its rear end in spaced relationto the inner end of the spring, and means for conmeeting the last-namedends to a Support,

the said brace having a curved portion lying in abutting engagement withthe butter springfor a portion of its length.

4;. Bumper structure comprising a buii'er spring curved in a verticalplane, a bumper bar connected to the outer end of said spring,

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' a yieldable supporting arm, a brace member secured to said spring andhaving its rear end in spaced relation to the inner end or the spring,and means for pivotally connecting the last-named ends to a support.

5. Bumper structurefcomprising a butler spring curved in a verticalplane, abun'iper bar connected to theouter end of said spring, ayieldable supporting arm, a brace member secured to said spring andhaving its rear 7 Bum oer structure com risin a bum er bar, a curvedbuffer spring pivotally conn'ected at its outer end to said bar, a braceconnected to said buffer spring at a point adjacent to its inner end,and'means for connecting the inner ends of said spring and brace toopposite" sides of a support, for movement on'an axis transverse'to thatof the first-named pivotal connection.

8. Bumper structure comprising a butter spring, a bumper bar connectedto the outer end of said spring, a brace member secured to said sprmgand having its rear end 1n spaced relation to theinner end or" the 1spring, and means for connectingjthe lastnamed ends to a supporathe saidbrace having a portion lying in abutting engagement with the bufferspring for such distance beyond its point of attachment thereto as toreinforce said spring against bending.

In testimony whereof I, the said FRED- ERICK Gr. BREMER, have hereuntoset my hand.

FREDERICK G. BREMER.

